LibGit2Sharp v0.22

Add CustomHeaders in the push options (#1217)
Expose the minimal diff algorithm (#1229)
Expose Reset() with checkout options (#1219)
Add a prettify option to history rewrite options (#1185)
Add option to describe to only follow the first parent (#1190)
Allow setting the config search path (#1123)
Provide access to the remote's host HTTPS certificate (#1134)
Add support for rebase (#964)
ListReferences() now accepts a credentials provider (#1099)
Introduce FileStatus.Conflicted and introduce staging of conflicts (#1062)
Support streaming filters written in C# (#1030)
Add support for the pre-push callback (#1061)
Add support for listing remote references without a Repository instance (#1065)
Add StashCollection.Apply() and .Pop() (#1068)
Support retrieving a configuration for a repository without instantiating it (#1042)
Implement 'log --follow'-like functionality (#963)
Introduce in-memory merging via Repository.MergeCommits() (#990)
Allow setting whether to prune during a fetch (#1258)

Deprecate MergeConflictException in a backwards-compatible way (#1243)
Improve type safety in the generic type for Diff.Compare() (#1180)
Obsolete Repository.Commit(), NoteCollection.Add() and
NoteCollection.Remove() overloads which do not require a signature (#1173)
BuildSignature() no longer tries to build a signature from the
environment if there is none configured (#1171)
Rename the commit walker's Since to IncludeReachableFrom and Until to ExcludeReachableFrom (#1069)
Rename MergeConflictException to CheckoutConflictException to more
accurately reflect what it means (#1059)
Specify the diff algorithm instead of setting a boolean to use patience (#1043)
Remove optional parameters (#1031)
Move Repository.Reset(paths) into Index (#959)
Move FindMergeBase() overloads to ObjectDatabase (#957)

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